摘要:
An impact biopsy device is disclosed. The impact biopsy device may be configured to displace various cutting elements, such as an outer tubular member and cutting element and a cannula to sever a tissue sample from a patient. The impact biopsy device may comprise an actuation system configured to transfer displacement or force to the cutting elements by the impact of an element on another element.
摘要:
A medical appliance or prosthesis may comprise one or more layers of rotational spun nanofibers, including rotational spun polymers. The rotational spun material may comprise layers including layers of polytetrafluoroethylene (PTFE). Rotational spun nanofiber mats of certain porosities may permit tissue ingrowth into or attachment to the prosthesis. Additionally, one or more cuffs may be configured to allow tissue ingrowth to anchor the prosthesis.
摘要:
A multilayered inflatable medical appliance is disclosed. The appliance may comprise multiple adjacent layers disposed to increase total burst strength, puncture resistance or other properties. One or more layers may be comprised of a rotational spun fiber coating. Further, in some embodiments, additional top coatings may be included. Multilayered constructs may be configured with higher burst strengths and/or puncture resistance as compared to single layer constructs.
摘要:
A stent comprised of a valve and a scaffolding structure having components configured to allow at least a portion of the stent to decrease in diameter in response to an axial force applied to the stent. Further, the components and elements of the stent may be configured to balance transverse forces applied to the stent, thus reducing the incidence of infolding.
摘要:
An implantable device and method are disclosed for stenting an occlusion of an airway. The implantable device includes a cylindrical tube shaped proximal region, a flared distal region, and a non-bifurcated single lumen extending through the device. The proximal region defines a proximal portion of the lumen and the distal region defines a distal portion of the lumen. The distal region may flare outward laterally at a first angle and anteroposterior at a second angle, thereby forming an elliptically shaped distal opening to the lumen. The distal edge of distal opening may lie entirely in a plane orthogonal to a longitudinal axis of the device. Alternatively, the distal edge may be non-planar, such as concave or convex, when viewed in an anteroposterior direction. The implantable device may be formed of a scaffolding structure.
摘要:
A filter, configured to be disposed within a body lumen, that includes one or more filtering zones. The filter may include one or more sets of legs, configured to interact with the body lumen wall in order to stabilize the position of the filter and to create a filtering structure. In some embodiments the filter may be integrally formed form a single tube of material.